Introduction

plone.formwidget.contenttree is a z3c.form widget for use with Plone. It uses the jQuery Autocomplete widget, and has graceful fallback for non- Javascript browsers.

There is a single-select version (AutocompleteSelectionFieldWidget) for Choice fields, and a multi-select one (AutocompleteMultiSelectionFieldWidget) for collection fields (e.g. List, Tuple) with a value_type of Choice.

When using this widget, the vocabulary/source has to provide the IQuerySource interface from z3c.formwidget.query and have a search() method. The easiest way to do this is generate one with one of:

• plone.formwidget.contenttree.PathSourceBinder(navigation_tree_query=None, **kw)
• plone.formwidget.contenttree.ObjPathSourceBinder(navigation_tree_query=None, **kw)
• plone.formwidget.contenttree.UUIDSourceBinder(navigation_tree_query=None, **kw)

Where navigation_tree_query is some restrictions that should be applied to any Catalog query. The rest of the arguments are used to form a filter (see source.py).

PathSourceBinder and ObjPathSourceBinder store the selected object’s path in the field value. This means that the link will be broken if the object is moved. UUIDSourceBinder stores UUID references, so will handle pages being moved.

If you do not want to filter the content tree whatsoever, there are some pre-baked instances too:

• plone.formwidget.contenttree.path_src_binder
• plone.formwidget.contenttree.obj_path_src_binder
• plone.formwidget.contenttree.uuid_src_binder

Example Usage::

from zope.component import adapter
from zope.interface import Interface
from zope.interface import implementer
from zope import schema
from plone.z3cform import layout
from z3c.form import form
from z3c.form import button
from z3c.form import field
from plone.formwidget.contenttree import ContentTreeFieldWidget
from plone.formwidget.contenttree import MultiContentTreeFieldWidget
from plone.formwidget.contenttree import PathSourceBinder


class ITestForm(Interface):

    buddy = schema.Choice(
        title=u"Buddy object",
        description=u"Select one, please",
        source=PathSourceBinder(portal_type='Document')
    )

    friends = schema.List(
        title=u"Friend objects",
        description=u"Select as many as you want",
        value_type=schema.Choice(
            title=u"Selection",
            source=PathSourceBinder(portal_type='Document')
        )
    )


@implementer(ITestForm)
@adapter(Interface)
class TestAdapter(object):

    def __init__(self, context):
        self.context = context

    def _get_buddy(self):
        return None

    def _set_buddy(self, value):
        print "setting", value

    buddy = property(_get_buddy, _set_buddy)

    def _get_friends(self):
        return []

    def _set_friends(self, value):
        print "setting", value

    friends = property(_get_friends, _set_friends)


class TestForm(form.Form):
    fields = field.Fields(ITestForm)
    fields['buddy'].widgetFactory = ContentTreeFieldWidget
    fields['friends'].widgetFactory = MultiContentTreeFieldWidget
    # To check display mode still works, uncomment this and hit refresh.
    #mode = 'display'

    @button.buttonAndHandler(u'Ok')
    def handle_ok(self, action):
        data, errors = self.extractData()
        print data, errors


TestView = layout.wrap_form(TestForm)